The emergency worker who sent the false missile to residents and visitors in Hawaii earlier this month has been fired and the administrator for the Hawaii Emergency Management Agency resigned on Tuesday, officials said at a press conference in Honolulu.

Vern Miyagi, the administrator for the Hawaii Emergency Management Agency, took "full responsibility" and offered his letter of resignation on Tuesday.

An interim administrator, Col. Moses Kaoiwi, has been appointed to fill the position.

Additionally, a second HiEMA employee resigned before disciplinary action was taken and another was suspended without pay, said Maj. Gen. Arthur Logan during the press conference Tuesday on the findings of their independent investigation.

Jennifer Sinco Kelleher / AP

Hawaii Emergency Management Agency Administrator Vern Miyagi

The unnamed employee, who is said to have worked with the Hawaii Emergency Management Agency for over 10 years, had on at least two prior occasions confused a drill with a real-life event, Hawaii Emergency Management officials said.

The employee's prior mistakes happened during a tsunami and a fire drill. In a report released on the investigation, it said the employee had "been a source of concern ... for over 10 years. ... He is unable to comprehend the situation at hand."

After sending the alert, the employee "froze" and appeared "confused," officials said. The report said the employee was directed to send a cancel message, but "just sat there and didn't respond."

Another employee "took control" of the mouse and sent the cancelation alert. "At no point did Employee 1 assist in the process," the report says.

A Federal Communications Commission report also released Tuesday said the emergency worker who sent an incorrect warning message on Jan. 13 actually believed the threat was real.

According to the FCC report, the decision of a Hawaii Emergency Management Agency supervisor to conduct an unannounced ballistic missile defense drill began the chain of events that led to 38 minutes of widespread panic and fear.

The midnight-shift supervisor intended to test the day-shift staff with an unannounced drill, but because of a verbal miscommunication between the midnight-shift and day-shift supervisor, the latter believed the drill was intended for the night-shift, and therefore was unprepared and unaware for the drill.

"At 8:05 a.m., the midnight shift supervisor initiated the drill by placing a call to the day shift warning officers, pretending to be U.S. Pacific Command," the report read, which noted that this was normal protocol.

The midnight shift supervisor then played a recording that began with the words, “Exercise, exercise, exercise." But the rest of the message, which was not in accordance with the Hawaii EMA’s standard operating procedures and was a recording for "an actual live ballistic missile alert," also said, “this is not a drill.”

According to a statement from the day-shift warning officer who eventually would issue the false alert, the officer said he heard the words “this is not a drill,” and did not hear “exercise, exercise, exercise.”

The day shift warning officer believed there was an incoming ballistic missile heading towards the Hawaiian islands and used the agency's software to send out the alert.

"BALLISTIC MISSILE THREAT INBOUND TO HAWAII. SEEK IMMEDIATE SHELTER. THIS IS NOT A DRILL," read the alert to people's phones, which immediately caused a panic among residents and on social media who wondered if the next minutes would be their last.

While other officers told the FCC investigators that they knew the phone call was a drill, the officer at the alert terminal, who has refused to talk to investigators and has instead provided the statement, went ahead with the procedure for sending out an alert.

"The day-shift warning officer seated at the alert origination terminal, however, reported to the Hawaii Emergency Management Agency after the event their belief that this was a real emergency, so they clicked 'yes' to transmit the alert," the report stated.

"Because we’ve not been able to interview the day-shift warning officer who transmitted the false alert, we’re not in a position to fully evaluate the credibility of their assertion that they believed there was an actual missile threat and intentionally sent the live alert (as opposed to believing that it was a drill and accidentally sending out the live alert)," the report read.

"But it is worth noting that they accurately recalled after the event that the announcement did say 'This is not a drill.'"

Hawaii Governor David Ige was notified two minutes after the alert that it was indeed a mistake.

"At 8:10 a.m.," two minutes after the alert was sent out, "the Director of the Hawaii Emergency Management Agency communicated to United States Pacific Command that there was no missile launch, confirming what Pacific Command already knew," the report read.

For the next 13 minutes, Hawaii's EMA alerted "county emergency management agencies and radio and TV stations to inform them that the alarm was false" while the "agency’s phone lines also became congested with incoming calls from the public asking about the nature of the alert that they just received."